TOEFL IELTS foolish Definition Lacking good sense or judgment; unwise. Example "Making decisions without facts is foolish and often leads to regret." Sign in to save TOEFL Quiz → IELTS Quiz → ← foolhardy foolproof → Study tips featuring "foolish" Audit Your Own Writing to Find Gaps TOEFL Academic Vocabulary: Study by Topic Boost Your IELTS Writing With Precise Vocabulary Related words TOEFL swiftness GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate GRE abduct SAT abet GRE abhor GRE abide SAT abject TOEFL ablaze